Compactor roller for a soil compactor

ABSTRACT

The invention relates to a compactor roller for a soil compactor, comprising at least one exchangeable holder ( 22 ) on an outer circumference in order to attach a rolling tool ( 16 ).

CROSS REFERENCE TO RELATED APPLICATION

This application is a 35 U.S.C. 371 National Phase Entry Applicationfrom PCT/EP2012/073505, filed Nov. 23, 2012, which claims the benefit ofDE 10 2012 200 557.9, filed Jan. 16, 2012, the disclosures of which areincorporated herein in their entirety by reference.

The present invention relates to a compactor roller for a soil compactorby means of which substrates can be compacted and/or broken.

A compact roller for a soil compactor is known from DE 299 18 625 U1which at its outer circumference, in particular on the peripheralsurface of a roller sleeve, carries a plurality of pad feet fastened bymeans of welding. Such compactor rollers are in particular used forcompacting cohesive soils, like e.g. earth, clay or loamy soil. Owing totheir insufficient crushing characteristics, such compactor rollersprovided with pad feet are not suitable for other substrates to beprocessed such as rip-rap or the like.

It is the object of the present invention to provide a compactor rollerfor a soil compactor with which a high variability in use can beachieved.

According to the present invention, this object is attained by acompactor roller for a soil compactor comprising at least one changeholder on the outer circumference for attaching a roller tool.

In the case of the compactor roller designed according to the presentinvention, the roller tools, such as pad feet, to be provided on theouter circumference thereof are not permanently fastened, by way ofexample, by means of welding, but by means of an change holderarrangement which allows for optionally attaching and also removing suchroller tools from the compactor roller. On the one hand, this allows fora simple replacement of worn roller tools. On the other hand, it ispossible to configure or modify one and the same compactor roller, inparticular also without having to remove it from a soil compactor, fordifferent types of use by replacing the roller tools and selecting thetool that is suitable or required for processing a certain substrate ineach case.

In order to also achieve a good processing result, in particular a goodcompaction result taking into account the variability of the intendeduse, it is proposed that a plurality of rows annularly extending aboutan axis of rotation of the compactor roller each having a plurality ofchange holders is provided, where in a particularly preferred variant itis provided that the change holders are offset relative to one anotherin the direction of the rows that are immediately adjacent in thedirection of the axis of rotation.

In order to attain the support interaction of a roller tool with thecompactor roller in a simple manner, it is furthermore proposed that atleast one roller tool to be fastened on an change holder comprises acounter-holder that can be brought into retaining engagement with anchange holder and locked relative to the change holder.

In this way, a very stable support interaction can be accomplished inthat the change holder or counter-holder comprises a holder opening andthat the counter-holder or the change holder has a holder shaft that canbe inserted into the holder opening.

With the counter-holder in retaining engagement with an change holder,the fixation of a roller tool can easily be accomplished in that thecounter-holder can be locked to the change holder by means of a lockingmember. It should at this point be noted that an change holder, a holdershaft and a locking member respectively provided on the compactor rollerprovide an change holder arrangement in which the counter-holder or, asthe case may be, also the locking member as well, to be used in eachcase is also replaced when the roller tool is replaced.

In an embodiment that can be realized in an easy and nevertheless stablemanner it can be provided that the locking member comprises at least onelocking pin, wherein locking pin receiving recesses, which are at leastin part aligned with one another, are provided on the change holder andon the counter-holder when the holder shaft is inserted in the holderopening, whereas

the locking stability can still be improved in that the locking memberis configured as U shaped and provides two locking pins.

Chisels as well as, by way of example, so-called round shank chisels, aswell as pad feet can respectively be used as roller tools in thecompactor roller according to the present invention. In particular, whena pad foot is used as a roller tool it is an advantage to make sure thatsaid pad foot is secured against rotation, and thus can be kept in adefinite position on the outer circumference of the compactor roller.For this purpose, it can, by way of example, be provided that a pad footused as a roller tool comprises an essentially curved contact areaadapted to the curved outer circumference of the compactor roller.

Roller tools of the same type can be exclusively provided on thecompactor roller. Alternatively, roller tools of at least two differenttypes can be provided. In this case, in order to achieve an optimumprocessing result, it is advantageous if roller tools of one type androller tools of another type preferentially alternate with each other ina periodic pattern in at least one row.

For stability reasons, an especially advantageous embodiment can providethat at least one change holder has a connection area that ispreferentially adapted to the curved outer circumference of thecompactor roller for connecting an outer peripheral surface of thecompactor roller, as well as a support area spaced apart from the outerperipheral surface of the compactor roller configured for supporting aroller tool, wherein the at least one change holder is preferentiallyconfigured tapering from the connection area toward the support area.

If, in this case, the at least one change holder has two peripheralsides essentially oriented in the circumferential direction of thecompactor roller as well as two axial sides essentially oriented in thedirection of the axis of rotation of the compactor roller, theperipheral sides being preferentially inclined toward one another at agreater angle than the axial sides, the fact that the change holderperforms a movement in the circumferential direction of the compactorroller while processing the soil can be accounted for by the so createdin general rectangular contour of the at least one change holder, sothat a uniform processing result can also be achieved independently ofthe direction of movement.

In order to also contribute to the soil processing with at least onechange holder, it is furthermore proposed that between the connectionarea and the support area the at least one change holder has a soilprocessing area coming into contact with the soil to be processed whenthe roller tool is attached thereto. The interaction of the soilprocessing area with the soil to be processed can, in this case, bereinforced in that at least one soil processing projection is providedon at least one peripheral side in the soil processing area. If it isprovided that the at least one soil processing projection has aprojection height increasing away from the connection area to a maximumprojection height, and/or has a maximum projection height decreasingtoward the support area, the at least one soil processing area attainsan in general tooth-like configuration which reinforces its effect onthe soil to be processed, by way of example, stone to be crushed.

For a stable support of a roller tool attached to the at least onechange holder, it can be provided that in the support area the holderopening is surrounded by a first support surface on the change holderthat is essentially orthogonal relative to the radial direction of theaxis of rotation of the compactor roller. In this case, a firstcounter-support area that can be supported on the first support surfaceis advantageously provided on at least one roller tool.

In order to achieve a mounting on the change holder that is stableagainst rotation it is proposed that a positive form-locking engagementformation is provided in the support area to create a positiveform-locking engagement with a counter-positive form-locking formationon a roller tool.

By way of example, for a support interaction with a roller tool it canbe provided that a plurality of second support surfaces arranged at anangle to one another is provided in the support area around the holderopening on the change holder, each second support surface being providedin the adjacent area of a peripheral side or an axial side. By means ofthe angular arrangement of the second support surfaces relative to oneanother and preferentially also to a radial direction relative to anaxis of rotation of the compactor roller, or also to the peripheral oraxial sides, an in general non-rotationally symmetric and peripheralpositive form-locking ensuring configuration is attained by these secondsupport surfaces as a whole that prevents the rotation of the rollertool when it is supported by these second support surfaces.

This positive form-locking interaction between the at least one changeholder and a roller tool to be attached thereto can further bereinforced in that between two second support surfaces at least a thirdsupport surface arranged at an angle relative to the second supportsurfaces is provided in the support area on at least one axial side,and/or that between two second support surfaces at least a fourthsupport surface arranged at an angle relative to these two supportsurfaces is provided in the support area on at least one peripheralside. It is in this case in particular possible that the second supportsurfaces, and/or the third support surfaces, and/or the fourth supportsurfaces are arranged at an angle relative to the first support surface.For example, the second support surfaces can also, for example,annularly surround the first support surface together with the thirdand/or fourth support surfaces. This annular configuration of the secondsupport surfaces, or, as the case may be, of the third support surfacesand, as the case may be, the fourth support surfaces allows for anattachment to the change holder that uniformly distributes the forceacting on a roller tool in the change holder, nevertheless reliablypreventing the rotation of the roller tool owing to the facet-likearrangement of the support surfaces.

For an interaction of a roller tool with these different supportsurfaces it can be provided that at least one roller tool at least has asecond counter-support area as a support on a second support surface,and/or at least a third counter-support area as a support on a thirdsupport surface, and/or at least a fourth counter-support area as asupport on at least a fourth support surface. Depending on theembodiment of a roller tool, it can also, by way of example, be providedthat said roller tool only interacts with the change holder in the areaof the second support surfaces to create an anti-rotation positiveform-locking with the change holder as well. In another embodiment, thesecond and/or third support surfaces can alternatively or additionallyalso be included in the creation of this support interaction oranti-rotation positive form-locking.

In order to prevent, as far as possible, the formation of interferingsurfaces parallel to the soil or substrate to be processed which affectthe processing efficiency during soil processing, it is proposed that atransition area of at least one peripheral side, and/or of at least oneaxial side, and/or of at least the first support surface, and/or of atleast a second support surface, and/or of at least a third supportsurface, and/or of at least a fourth support surface is chamfered orrounded relative to a respectively adjacent other side and/or surface.

For a stable connection of a roller tool to an change holder it can beprovided that a locking-member receiving opening preferentiallyconfigured like an annular groove is provided on the inner surface ofthe holder opening, and/or that a second locking-member receivingopening is preferentially configured like an annular groove on the outercircumference of the holder shaft. In this case, the locking force canbe transmitted between the change holder and a roller tool to beattached thereto in that, by way of example, a preferentially annular,locking member for locking a roller tool to an change holder, which canbe engaged in the respectively other locking-member receiving opening,is received in the first locking-member receiving opening or in thesecond locking-member receiving opening.

In particular, if due to their essentially rotationally symmetricembodiment the formations used for locking can in fact prevent adetachment, but in principle cannot provide an anti-rotation effect, buta roller tool nevertheless has to be kept in a defined anti-rotationposition on the change holder, it can be provided that a receivingopening is provided on a holder shaft provided on the roller tool for ananti-rotation member to be positioned engaging in an anti-rotationrecess on the change holder.

Furthermore, the design can be such that at least one change holderpreferentially encloses the inner space of an change holder with anouter peripheral surface of the compactor roller, the inner space of thechange holder being open on at least one axial side essentially orientedin the direction of the axis of rotation of the compactor roller. Inthis case, the change holder is, for example, not configured as amassive material block fully adjoining the outer peripheral surface ofthe compactor roller, but rather it defines an inner space that isaccessible on one axial side. In this way, not only is material saved inthe construction of the change holder, but it is also possible to act ona roller tool attached to the change holder by means of a removal tooland detach it from the change holder.

In order to facilitate this interaction of a removal tool with a rollertool it is proposed that a holder shaft provided on the roller toolprotrudes into the inner space of the change holder through a holderopening provided on the change holder when an change holder is attachedthereto. The end of the holder shaft protruding over the holder openinginto the inner space of the change holder is thus free for engaging aremoval tool, so that by pushing the holder shaft out of the holderopening a locking member engaged in the respective locking-memberreceiving openings is detached from one of these openings and the rollertool can be slid off the change holder.

In another advantageous embodiment variant it is proposed that theholder opening provided on the change holder has a longitudinal openingaxis essentially radially oriented relative to an axis of rotation ofthe compactor roller and that, when the roller tool is attached to thechange holder, a longitudinal axis of the holder shaft provided on theroller tool is essentially radially oriented. This orientation of aholder opening, or of a holder shaft provided on a roller tool on theone hand simplifies the previously described removal process as well asthe mounting process. On the other hand, it is ensured that in this waysame force interaction characteristics between the holder shaft and theholder opening receiving it are achieved independently of the directionof movement, and thus a uniform stable mounting of a roller tool on thechange holder can be ensured likewise independently of the direction ofmovement.

The present invention furthermore relates to a soil compactor having atleast one compactor roller designed according to the present invention.

The invention will hereinafter be described in detail with reference tothe attached figures. They show:

FIG. 1 a perspective view of a compactor roller having a plurality ofroller tools of one type provided on the outer circumference thereofthat can be used in a soil compactor;

FIG. 2 a partial cross-sectional view of the compactor roller of FIG. 1;

FIG. 3 an exploded view of an change holder arrangement having a rollertool, an change holder and a locking member;

FIG. 4 a view of a compactor roller corresponding to FIG. 1 havingroller tools of a different type;

FIG. 5 a partial cross-sectional view of the compactor roller of FIG. 4;

FIG. 6 an exploded view of an change holder arrangement having a rollertool, an change holder and a locking member;

FIG. 7 another view of a compactor roller corresponding to FIG. 1 havingroller tools of two different types on the outer circumference;

FIG. 8 a partial cross-sectional view of the compactor roller of FIG. 7;

FIG. 9 an exploded view of an change holder arrangement having a rollertool, an change holder and a locking member;

FIG. 10 an exploded view of an change holder arrangement having a rollertool, an change holder and a locking member;

FIG. 11 a perspective view of an alternative type of embodiment of acompactor roller corresponding to FIG. 1 having a plurality of rollertools provided on the outer circumference thereof;

FIG. 12 a partial cross-sectional view of the compactor roller of FIG.11;

FIG. 13 a lateral view of an change holder used in the compactor rollerof FIG. 11, viewed in the direction of an axis of rotation of thecompactor roller having a roller tool of one type mounted thereon;

FIG. 14 a perspective view of the change holder of FIG. 13;

FIG. 15 a perspective view of the change holder of FIG. 13 without theroller tool;

FIG. 16 another perspective view of the change holder of FIG. 13;

FIG. 17 a view corresponding to FIG. 13 without the roller tool mountedon the change holder;

FIG. 18 a lateral view of the change holder of FIG. 13 viewed in thecircumferential direction;

FIG. 19 the change holder of FIG. 17 viewed in the direction of visionXIX in FIG. 17;

FIG. 20 the change holder of FIG. 17 viewed in the direction of visionXX in FIG. 17;

FIG. 21 a partial axial view of the compactor roller of FIG. 11 whileprocessing soil;

FIG. 22 the compactor roller of FIG. 11 with other roller tools mountedon the change holders;

FIG. 23 a partial cross-sectional view of the compactor roller of FIG.22;

FIG. 24 a view of the change holder of the compactor roller of FIG. 22having a roller tool of a different type attached thereto, viewed in thedirection of an axis of rotation of the compactor roller;

FIG. 25 a perspective view of the change holder having the roller toolof FIG. 24 mounted thereon;

FIG. 26 different roller tools to be combined with an change holder;

FIG. 27 a procedure for mounting a roller tool on an change holder;

FIG. 28 a procedure for removing a roller tool from an change holder.

FIG. 1 shows a compactor roller in general designated with 10 that canbe used in a soil compactor. The compactor roller 10 that can be rotatedabout a roller axis A when the compactor is operated comprises acylindrical roller sleeve 12. A plurality of roller tools 16 is providedon an outer peripheral surface 14 of the roller sleeve 12. These rollertools 16 are provided in the form of chisels 18, in particular so-calledround shaft chisels, in the exemplary embodiment shown in FIGS. 1 to 3.

The roller tools 16 or chisels 18 can be fastened on the compactorroller 10 by means of the respective change holder arrangements 20described hereinafter in detail with reference to FIGS. 2 and 3.

The change holder arrangements 20 comprise an change holder 22 made ofmetal with its connection area 76 on the outer peripheral surface 14 ofthe roller sleeve 12 fastened, or that can be fastened, by way ofexample, by means of welding, with a holder opening 24 configuredtherein and, by way of example, radially oriented relative to the rolleraxis A and radially open outward. A holder shaft 26 is respectivelyconfigured on the roller tools 16, namely the chisels 18 in the shownexample, whose outer contour corresponds to that of the holder opening24, namely circular in the shown example. The holder shaft 26 forms acounter-holder 28 which can be brought into engagement with the changeholder 22 by introducing said counter-holder 28 into its holder opening24.

In an end section facing away from the outer peripheral surface 14 thechange holder 22 forms a support area 72 with a preferentially annularperipheral first support surface 80 around the holder opening 24. Saidsupport surface 80 preferentially has a planar configuration and can beorthogonal relative to the radial direction of the roller axis A. Inorder to fasten the chisel 18 on the change holder 22 the holder shaft26 is, by way of example, pressed into the holder opening 24 until afirst counter-support region 97 contacts the chisel head 46 on the firstsupport surface 80. The forces developing during the soil processingoperation which load the chisel 18 in the direction of the change holder22, can thus essentially be absorbed by supporting the counter-supportarea 97 on the first support surface 80.

It is visible in FIG. 3 that a preferentially peripheral groove-likerecess 30 is provided in the holder shaft 26. When the holder shaft 26is completely inserted in the holder opening 24, this groove-like recess30 is located in a longitudinal section of the holder opening 24 inwhich two hole-like recesses 32, 34 configured in the change holder 22are positioned. These hole-like recesses 34 are in an approximatelyorthogonal plane relative to the longitudinal opening axis L₁ of theholder opening 24 and exit into, or touch the holder opening 24.

An essentially U shaped locking member 36 forms locking pins 38, 40 withboth its U legs, which can be inserted into the recesses 32, 34. Whenthe holder shaft 26 is completely inserted in the holder opening 24, thegroove-like recess 30 is aligned with the recesses or holes 32, 34 opentoward the holder opening 24, so that when the locking member 36 iscompletely pushed in, the locking pins 38, 40 pass through the recesses32, 34 and engage in the groove-like recess 30. In order to lock thelocking member 36 to the change holder 22, the locking member 36 can beconfigured, by way of example, with curved holding sections 42, 44 whosecurvature is at least approximately adapted to the curvature of thegroove-like recess 30, so that these holding segments 42, 44 create aengaging effect co-operating with the groove-like recess 30. Otherfixations or engaging formations can, obviously, also be used to securethe locking member 36 on the change holder 22 and/or on thecounter-holder 28 against loss.

By means of the design of an change holder arrangement described withreference to FIG. 3 it is possible to easily fasten roller tools 16 onthe compactor roller 10 or again remove them therefrom. By designing theroller tools 16 as chisels 18 with a chisel head 46 and a chisel tip 48made of hard metal, by way of example, provided therein, suchmounting/removal is possible for replacing worn chisels 18. Chisels ofdifferent geometries adapted to the currently intended use can obviouslyalso be fastened on the compactor roller 10.

As is visible in FIG. 1, the change holders 22 are arranged on the outercircumference of the compactor roller 10 in a plurality of annular rows50 extending around the roller axis A. The change holders 20, which areprovided in axially immediately adjacent rows 50 are offset relative toone another in the direction of the rows, in other words in thecircumferential direction, so that a very dense pack of the roller tools16 at a nevertheless maintained separation is accomplished.

FIGS. 4 to 6 show a compactor roller 10 of the previously describeddesign in which pad feet 52 are provided as roller tools 16 instead ofthe chisels 18 described above. As is in particular shown in FIG. 6, theembodiment of an change holder arrangement described above withreference to FIG. 3 can identically also be used for fastening the padfeet 52. For this purpose, the holder shaft 26 acting as acounter-holder 28 is fastened, by way of example, by means of welding,on the inner side of the pad feet 52 configured as hollow parts. Byinserting the holder shaft 26 into the holder opening 24 provided in adedicated change holder 22 and subsequently locking it by means of thelocking member, each pad foot 52 can be fastened on the circumference ofthe compactor roller 10. Owing to the arrangement of the change holders22 on the outer circumference of the compactor roller 10 in respectiverows 50 described above with reference to FIG. 1, a correspondingrow-like configuration of the now provided pad feet 52 results on theouter circumference of the compactor roller 10.

The pad feet 52 are designed with a front side 54 facing away in thedirection of the outer peripheral surface 14 of the roller sleeve 12,two peripheral sides 56, 58 being oriented in the circumferentialdirection and two axial sides 60, 62 being oriented in the axialdirection. The peripheral sides 56, 58 include a greater angle ofinclination to the front side 54 than the axial sides 60, 62. At theircontact areas 64 to be brought into contact with the outer peripheralsurface 14 located opposite the respective front side 54, the pad feet52 are configured with a curved structure adapted to the curvature ofthe roller sleeve 12 or of the outer peripheral surface 14. This curvedstructure can be accomplished by correspondingly shaping the end sectionof both axial sides 60, 62 circularly, or by means of a segmental linearcurved structure, which is however approximately circular as a whole. Inthis way, it is ensured that the pad feet 52 locked to the compactorroller 10 by means of the respective change holder arrangements 20 arealso secured against rotation, although the respective holder shafts 26can in principle be rotated in the dedicated holder openings 24 owing tothe cross-sectional geometry and also to the locking effect of thelocking members 36. This rotatability is an advantage when using chiselsas roller tools, as a one-sided wear thereof can be prevented. It isthus possible to lock a variety of roller tools 16 required to meetdifferent requirements, that is, on the one hand, rotatability, and onthe other hand security against rotation, with one and the same changeholder 22.

In order to ensure this variability, namely providing roller tools ofdifferent types and thus also of different sizes on the outercircumference of the compactor roller 10, it is furthermore advantageousto provide the change holders 22 spaced apart from the respectivelyadjacent change holders 22 in the circumferential direction as well asin the axial direction such that roller tools of bigger sizes in therespective directions can be attached on the immediately adjacent changeholders 22. This in particular means that the distance between two rows50 in the axial direction should at least correspond to half the widthof a respective pad foot measured between both axial sides 60, 62.

In order to move the locking members 36 into the dedicated recesses 32,34, 30 in the exemplary embodiment shown in FIGS. 4 to 6, it isadvantageous to arrange at least one of the axial sides 60, 62 with anopening 66 through which the locking member 36 can be inserted and alsodisengaged.

FIGS. 7 to 10 show an exemplary embodiment in which roller tools 16 ofdifferent types are distributed over the outer circumference of one andthe same compactor roller 10. The chisels 18 already described abovewith reference to FIG. 1 as well as the pad feet 52 described above withreference to FIG. 4 are provided. In this case, the arrangement can inparticular be such that a periodic pattern of roller tools 16 of onetype and roller tools 16 of another type is provided in each row 50.Chisels 18 alternating with pad feet 52 are in particular visible inFIG. 7.

With the design shown in FIGS. 7 to 10 in which the change holderarrangements 20 already described above are again used, and in fact inconnection with pad feet 52, as well as in connection with chisels 18,it can furthermore, by way of example, be provided that the chisels 18have a larger projection height over the outer peripheral surface 14 ofthe roller sleeve 12 than the pad feet 52. A projection height of a newchisel 18 can, by way of example, be selected in the range of more than10 mm. This ensures that the chisel heads 46 reaching beyond the frontsurfaces 54 can adequately apply their abrasive or crushing effect inspite of the presence of the pad feet 52.

FIGS. 11 and 12 show a compactor roller that can be used in a soilcompactor of an alternative design, in particular with respect to thechange holder arrangements. The components corresponding to componentsdescribed above with respect to design or function are designated withthe same reference numerals with the addition of a suffix “a”.

In the compactor roller 10 a shown in FIG. 11, a plurality of changeholder arrangements 20 a is also provided on the outer peripheralsurface 14 a of the cylindrical roller sleeve 12 a. Advantageously, thearrangement here is also such that rows 50 a are formed by consecutivechange holder arrangements 20 a, wherein the change holder arrangements20 a are offset relative to one another in the circumferential directionby rows 50 a that are adjacent in the direction of the axis of rotationof the compactor roller or roller axis A, by way of example, byapproximately half the peripheral length of such an change holderarrangement 20 a. This results in a very uniform coverage of the outerperipheral surface 14 a of the roller sleeve 12 a, so that the soil canbe intensively processed and a direct contact of the peripheral surface14 a with the soil to be processed can to a large extent be prevented.This contact in fact occurs between the roller tools to be stilldescribed below and the soil to be processed, so that intensive pressurecan be applied thereto.

In the design of a compactor roller 10 a shown in FIGS. 11 and 12,chisels 18 a are respectively attached on the change holders 22 a of thechange holder arrangements 20 a, which are again also configured, by wayof example, as round shaft chisels in this case. The design of thesechange holder arrangements 20 a comprising, by way of example, chisels18 a, in particular also of the change holders 22 a thereof, shallhereinafter be described in detail with reference to FIGS. 13 to 20.

In the top view or radial view shown in FIG. 19 and also 20, the changeholder 22 a has an approximately rectangular outer contour, and in thelateral view shown, by way of example, in FIGS. 13 and 17, viewed in thedirection of the roller axis A, has an approximately trapezoidal outercontour.

The change holder 22 a is to be positioned with a connection area 70 aadjacent to the outer peripheral surface 14 a of the roller sleeve 12 aand is advantageously fastened by means of welding with its connectionarea 70 a on the outer peripheral surface 14 a. In doing so, aperipheral welding seam can advantageously be formed around therectangular contour of the connection area 70 a. In its superficial area71 a to be positioned adjacent to the outer peripheral surface 14 a, theconnection area 71 a can be adapted to the circularly curved outercontour of the roller sleeve 12 a in order to achieve a contact asextensive as possible and thus a load distribution as uniform aspossible.

Starting at the connection area 70 a, the change holder 22 a has atapering contour in the direction away from the outer peripheral surface14 a and toward a support area in general designated with 72 a. Bothperipheral sides 56 a, 58 a oriented in the circumferential direction aswell as both axial sides 60 a, 62 a oriented in the direction of theroller axis A are in this case arranged at an angle to one another. Bycomparing FIGS. 17 and 18, it becomes clear that both peripheral sides56 a, 58 a enclose a greater angle to one another than both axial sides60 a, 62 a. It should be noted here that the peripheral sides 56 a, 58 aor also the axial sides 60 a, 62 a do not necessarily need to compriseabsolutely straight surfaces. As FIGS. 17 and 18 clearly show, thechange holder 22 a can be configured curved, by way of example, concaveat its peripheral sides 56 a, 58 a and/or its axial sides 60 a, 62 a.

As will still be described in detail below, the change holder 22 a witha soil processing area 74 a between the connection area 70 a and thesupport area 72 a is free, even when a roller tool 16 a is attached onthe change holder 22 a for contacting the soil to be processed. Incontrast to the embodiment also shown, by way of example, in FIGS. 5 and6, in which the change holder is completely covered by the roller toolmounted thereon, the change holder 22 a contacts the soil or substrateto be processed and thus contributes to an improved processing resultowing to the more intensive contact independently of which roller toolis mounted thereon.

On each of both its peripheral sides 56 a, 58 a, the change holder 22 ahas a rib-like or tooth-like soil processing projection 78 a for areinforced interaction with the soil to be processed. Said soilprocessing projection 78 a protrudes from the respective peripheral side56 a or 58 a and in its central area, viewed in the direction of theextension of the connection area 70 a to the direction of the supportarea 72 a, has a maximum projection height. The projection heightdecreases toward the connection area 70 a as well as in the direction ofthe support area 72 a, where, as it is clearly shown, by way of examplein FIG. 17, an essentially curved, advantageously concave contour of therespective soil processing projection can be provided.

The interaction of such an change holder 22 a or of a chisel 18 amounted as a roller tool thereon, is shown with the soil to be processedB in FIG. 21. It is visible there that on moving forward and downward inthe direction of the soil to be processed, a chisel 18 a moved in thedirection of the soil to be processed B can contact the soil to beprocessed B, in particular stone fragments, and crush them by applyingload on them. Correspondingly, the processing projections 78 a can alsocontact the stone fragments and generate an additional crushing effect.

In its support area 72 a the change holder 22 a has a holder opening 24a that is used for fastening the respective roller tool. Said holderopening 24 a is advantageously configured or oriented in the changeholder such that its longitudinal opening axis L₁ essentially extendsradially relative to the roller axis A when the change holder 22 a isfastened on the outer peripheral surface 14 a.

A first support area 80 a is provided that annularly surrounds theholder opening 24 a. The first support area 80 a is preferentiallyoriented such that it is essentially orthogonal to a radial linerelative to the roller axis A, that is, a radial direction whichessentially also corresponds to the orientation of the longitudinalopening axis L₁ in FIG. 16. In this case the first support surface 80 acan also essentially be planar. A slight curve, in particular convexcurve, of the first support surface 80 a is in principle not excluded.

Second support surfaces 82 a are formed in the support area 72 a where aperipheral side 56 a or 58 a is adjacent to an axial side 60 a or 62 a.These four second support surfaces 82 a lying diametrically opposite toone another in pairs relative to the longitudinal opening axis L₁ arearranged at an angle relative to one another and are also respectivelyarranged at an angle to a radial direction, as well as to the firstsupport surface 80 a and to the peripheral sides 56 a, 58 a and axialsides 60 a, 62 a, which they are respectively adjacent to.

Third support surfaces 84 a are respectively provided in the supportarea 72 a on both axial sides 60 a, 62 a between both second supportsurfaces 82 a. These are also arranged at an angle to one anotherrelative to the second support areas 82 a and relative to the firstsupport surface 80 a, which they are adjacent to. Fourth supportsurfaces 86 a are provided between the adjacent second support surfaces82 a on both peripheral sides 56 a, 58 a. These can also be arranged atan angle to one another relative to the second support surfaces 82 a andrelative to the first support surface 80 a.

The second to fourth support surfaces 82 a, 84 a, 86 a can respectivelybe configured as plane surfaces so that a facet-like contour of thesupport surfaces respectively adjacent to one another results in awhole. As is in particular apparent in connection with the fourthsupport surfaces 86 a, a curved embodiment of such support surfaces isin principle also possible.

In order to keep interfering surfaces essentially oriented parallel tothe soil to be processed as small as possible in the change holder 22 a,it is advantageously configured as chamfered or rounded where thesupport surfaces or sides are adjacent to one another. A dome-like orcurved total arrangement, which to a large extent prevents theoccurrence of interfering surfaces, also develops in the support area 72a as a result of the second to fourth support surfaces 82 a, 84 a, 86 aannularly surrounding the first support surface 80 a.

The change holder 22 a is designed with its trapezoidal contour viewedfrom the axial side such that with two change holder legs 88 a providinga partial area of the attachment area 70 a and a central area 90 aproviding a support area 72 a connecting both change holder legs 88 aand also the support area 72 a, it forms a spread U shape. Both changeholder legs 88 a and the central area 90 a together with the outerperipheral surface 14 a of the roller sleeve 12 a thus surround an innerspace of the change holder 92 a which, by way of example, is open onboth axial sides 60 a, 62 a. A continuous anti-rotation recess 94 a, byway of example, from the axial side 60 a to the axial side 62 a,likewise running across the holder opening 24 a and open in thedirection of the outer peripheral surface 14 a, is provided on theunderside of the central area 90 a facing the outer peripheral surface14 a. An anti-rotation member that will still be described below can bepositioned engaging in this anti-rotation recess 94 a and prevent therotation of a roller tool 16 a mounted on the change holder 22 a.

To fasten the roller tool also visible, by way of example, in FIGS. 13and 14, which is configured as a chisel 18 a on the change holder 22 a,the holder shaft provided on the chisel 18 a acting as a counter-holder28 a is inserted into the holder opening 24 a. A longitudinal axis L₂ ofthe holder shaft 26 a in this position then essentially also correspondsto the longitudinal axis L₁ of the holder opening 24 a and is alsoradially oriented relative to the roller axis A.

The chisel 18 a can in this case be inserted with its holder shaft 26 ainto the holder opening 24 a until the chisel head 46 a contacts thefirst support surface 80 a with a counter-support area 97 a protrudingover the holder shaft 26 a radially outward relative to the longitudinalaxis of the holder shaft L₂. A first annular peripheral groove-likelocking member receiving opening 98 a open radially inward relative tothe longitudinal axis L₁ can be configured on the inner peripheralsurface of the holder opening 28 a. Similarly, as it is clearly visiblealso in FIG. 10, a second groove-like, preferentially completelyperipheral locking-member receiving opening 100 a open radially outwardrelative to the longitudinal axis L₂ of the holder shaft 26 a can beconfigured on the outer circumference of the holder shaft 26 a. Thislocking-member receiving opening for receiving an annular locking member102 a is also visible, by way of example, in FIG. 26 on the differentroller tools 16 a or their holder shafts shown there.

On insertion of the holder shaft 26 a into the holder opening 24 a, thislocking member 102 a configured as a stop ring or clip ring can bepressed further into the second locking-member receiving opening 100 auntil both locking-member receiving openings are aligned with oneanother in the course of insertion and the locking member 102 aprotruding radially outward also locks into place in the firstlocking-member receiving opening on the change holder 22 a. In order tofacilitate or support this radial compression of the locking member 102a the holder opening 24 a can be configured in its section adjacent tothe first support surface 80 a with an insertion slope 103 a. The rollertool 16 a or the chisel 18 a is thus secured against undesireddetachment from the change holder 20 a. The particularly very highforces to be applied to the chisel 18 a in the direction of the changeholder 22 a when driving over soil are absorbed by supporting thecounter-support area 97 a on the first support surface 80 a.

If, in addition to the locking effect of the locking member 102 aagainst the movement of a chisel 18 a out of the change holder 22 a, arotatory movement of the chisel 18 a is to be prevented, an opening 104a can be configured in the holder shaft 26 a thereof, which is alignedwith the anti-rotation recess 94 a in the change holder 24 a when theholder shaft 26 a is fully inserted in the opening 24 a. Ananti-rotation member configured like a pin, by way of example, can thenbe inserted from an axial side 60 a or 62 a into the opening 104 athrough the anti-rotation recess 94 a and retained there, by way ofexample, by means of a clamping effect. The rotation of the chisel 18 acan to a large extent be prevented in this way. This is in particular anadvantage if the chisel 18 a is configured with a non-rotationalsymmetric profile in its tip area provided for processing a substrate.

FIGS. 22 to 25 show the use of a compactor roller 10 a of the designdescribed above in particular also with reference to FIG. 10 inconnection with pad feet 52 a used as roller tools 16 a. These interactwith the change holders 22 a, described in detail above with respect totheir design, to provide the change holder arrangements 20 a. As FIGS.24 and 25 clearly show, the pad feet 52 used together with the changeholders 22 a as roller tools 16 a, in particular the soil processingarea 74 a thereof not covered by the respective pad feet 52 a, result inan assembly acting as a pad foot as a whole. In this case, it can inparticular be provided that the peripheral sides 56 a′, and 58 a′ of arespective pad foot 52 a continue the peripheral sides 56 a, 58 a of anchange holder 22 a, by way of example, with a similarly curved profileor oriented at an angle to one another. Correspondingly, the axial sides60 a′ and 62 a′ can continue the axial sides 60 a and 63 a of the changeholder 22 a.

To be fastened on a respective change holder 22 a such a pad foot 52 ahas a holder shaft 26 a which, as it is also similarly indicated in FIG.6, extends downward from the respective pad foot 52 a and can bearranged on the change holder 82 a passing through the holder opening 24a. A locking effect against detachment of the pad foot 52 a can, by wayof example, again be achieved by means of a locking member 102 a that isalso visible in FIG. 26.

In order to prevent the rotation of the pad foot 52 a on the changeholder 22 a, it is configured such that it can be engaged in ananti-rotation positive form-locking with the different support surfacesconfigured in the support area 72 a, in particular the second and thirdsupport surfaces 82 a, 84 a. In this case, the second to fourth supportsurfaces 82 a, 84 a, 86 a, or the support surfaces interacting with apad foot 52 a and acting in an anti-rotation manner form a positiveform-locking formation 105 a, while the pad foot 52 a provides acounter-positive form-locking formation 107 a with its technicalmeasures that will still be described below.

To interact with the second support surfaces 82 a the pad foot 52 a isconfigured in its four corner areas, in other words in the respectivetransition area between one of the peripheral sides 56 a′, 58 a′ to oneof the axial sides 60 a′, 62 a′, with prolonged counter-support areas102 a extending in the direction of the holder shaft 26 a. They areformed such that they have surfaces complementary to the inclined secondsupport surfaces 82 a which fully rest on the second support surfaces 82a. Owing to the angular arrangement of the second support surfaces 82 arelative to one another and to the corresponding embodiment of thesecond counter-support areas 106 a, a positive form-locking engagementpreventing the rotation of the pad foot 52 a on the change holder 22 aaround the longitudinal axis of the holder shaft 26 a is accomplished. Arotation could only occur if the pad foot 52 a was taken off the changeholder 22 a, which, however, is prevented by the locking effect of thelocking member 102 a.

A corresponding mutual contact interaction could also be accomplishedwith third counter-support areas 108 a formed on the axial sides 60 a′and 62 a′ of the pad foot 52 a between respective counter-support areas106 a co-operating with the third support surfaces 84 a. Such ananti-rotation positive form-locking interaction could also beaccomplished or supported in fourth counter-support areas 110 arespectively formed on the peripheral sides 56 a′ and 58 a′ between twosecond counter-support areas 106 a by co-operating with the fourthsupport surfaces 86 a on the change holder 22 a.

FIG. 26 shows the variability of the change holder arrangement 20 adescribed above with respect to the usability of different roller tools16 a. Three different exemplary chisels 18 a are shown which can becoupled to the change holder 22 a depending on the requirements. Fourdifferent pad feet 52 a are furthermore shown which are identicallydesigned in particular for a positive form-locking interaction with thesupport area 72 a of the change holder 22 a preventing rotation on thechange holder 22 a in the area of their respective counter-positiveform-locking formation 107 a. All of these different roller tools 16 acan be attached to a compactor roller 10 a, on which the change holders22 a described above are fastened. In this case, any combination ofdifferent roller tools 16 a is possible.

FIG. 27 shows the procedure for attaching a roller tool 16 a, which is,by way of example, the chisel 16 a [sic, 18 a] or the pad foot 52 a, tothe change holder 22 a. The roller tool 16 a to be attached in each caseis inserted with its holder shaft 26 a into the holder opening 24 aprovided on the change holder 22 a and, by way of example, pushed inwith hammer strokes until the locking member 102 a configured as a stopring clicks into the locking-member receiving opening in the changeholder 22 a. The final assembled state is shown at the bottom right ofFIG. 27 a. In this state, the chisel head 46 a rests with itscounter-support area 97 a protruding radially over the holder shaft 26 aon the first support surface 80 a of the change holder 22 a. The lockingmember 102 a engages in the aligned locking-member receiving openings 98a, 100 a.

FIG. 28 shows the procedure for removing a roller tool 26 a, in otherwords, by way of example, the chisel 18 a, or the pad foot 52 a, fromthe change holder 22 a. As can be seen at the bottom right of FIG. 27,in the assembled state the holder shaft 26 a protrudes into the innerspace of the change holder 92 a. This state can be used for laterallyreaching into the inner space of the change holder 92 a, by way ofexample, by means of a crowbar 112 a or a similarly bent tool, engagingunder the holder shaft 26 a and, by tilting it into the firstlocking-member receiving opening 98 a provided on the change holder 22 aeliminating the locked state of the locking member 102 a, pushing outthe roller tool 16 a, in this case, by way of example, the chisel 18 a,from the opening 24 a at least until it can be completely pulled out ofthe opening 24 a by additionally grabbing the part of the roller tool 16a lying outside the chisel holder 22 a.

A sliding wedge 114 a can be used as an alternative tool which islaterally pushed into the inner space of the holder tool 92 a and bysupporting itself on the outer peripheral surface 14 a displaces theholder shaft 26 a in the opening 26 a, namely again until the lockingmember 102 a gives up its engaging effect. For this purpose, the slidingwedge 114 a can be pressed into the inner space of the change holder 92a by means of hammer strokes. In doing so, comparatively large forcescan be generated which can eliminate the engaging effect of the lockingmember 102 a.

As far as the roller tool 16 [sic, 16 a] is additionally secured againstrotation on the change holder 22 a by an anti-rotation member, prior tothe displacement of the holder shaft 26 a, this anti-rotation membercan, of course, be pushed out of the opening 104 a in the holder shaft26 a receiving it in order to consequently facilitate the displacementof the holder shaft 26 a in the direction of the longitudinal axis L₂.

It should finally be mentioned that with the design according to thepresent invention, other roller tools, in particular also otherdifferently shaped chisels, or differently shaped pad feet, or alsodifferent patterns provided on the outer circumference of a compactorroller can, of course, be attached. It should furthermore be noted thatby means of the change holder arrangements to be provided according tothe present invention the roller tools must not necessarily bepositioned directly on the outer peripheral surface of the rollersleeve. By way of example, it is also possible to provide anunstructured, plain roller sleeve and surround it, by way of example,with a multi-part shell-like sheath on which the chisel holders are thenfastened and the different roller tools can be attached.

The invention claimed is:
 1. A compactor roller for a soil compactorcomprising; at least one change holder on the outer circumference forattaching a roller tool, wherein at least one roller tool to be fastenedon a change holder comprises a counter-holder that can be engaged andretained with a change holder and locked relative to the change holder,wherein the change holder comprises a holder opening and thecounter-holder comprises a holder shaft that can be inserted into theholder opening, wherein at least one change holder has a connection areaadapted to the curved outer circumference of the compactor roller forconnecting to an outer peripheral surface of the compactor roller and asupport area configured to support a roller tool and arranged at adistance from the outer peripheral surface of the compactor roller, andwherein in the support area, the holder opening is surrounded at thechange holder by a first support surface that is essentially orthogonalwith respect to a radial direction relative to an axis of rotation ofthe compactor roller.
 2. The compactor roller according to claim 1,wherein a plurality of rows extending annularly around an axis ofrotation of the compactor roller respectively having a plurality ofchange holders is provided.
 3. The compactor roller according to claim1, wherein the change holders are offset to one another in the directionof rows that are immediately adjacent in the direction of the axis ofrotation.
 4. The compactor roller according to claim 1, wherein thecounter-holder can be locked by means of a locking member to the changeholder.
 5. The compactor roller according to claim 1, wherein thelocking member comprises at least one locking pin, wherein at leastpartly aligned locking-member receiving recesses are provided on thechange holder and on the counter-holder when the holder shaft isinserted in the holder opening.
 6. The compactor roller according toclaim 5, wherein the locking member is U-shaped and provides two lockingpins.
 7. The compactor roller according to claim 1, wherein the at leastone roller tool comprises a chisel, and/or that at least one roller toolcomprises a pad foot.
 8. The compactor roller according to claim 7,wherein a pad foot used as a roller tool has an essentially curvedcontact area adapted to the curved outer circumference of the compactorroller.
 9. The compactor roller according to claim 1, whereinexclusively roller tools of one type are provided on the compactorroller.
 10. The compactor roller according to claim 1, wherein rollertools of at least two different types are provided on the compactorroller.
 11. The compactor roller according to claim 2, wherein rollertools of one type and roller tools of another type alternate with oneanother in a periodic pattern in at least one row.
 12. The compactorroller according to claim 1, wherein the at least one change holder isconfigured tapering from the connection area toward the support area.13. The compactor roller according to claim 12, wherein the at least onechange holder has two peripheral sides essentially oriented in thecircumferential direction as well as two axial sides essentiallyoriented in the direction of an axis of rotation of the compactorroller, wherein the peripheral sides are inclined toward one another ata greater angle than the axial sides.
 14. The compactor roller accordingto claim 12, wherein between the connection area and the support area,the at least one change holder has a soil processing area coming intocontact with the soil to be processed when a roller tool is attachedthereto.
 15. The compactor roller according to claim 13, wherein atleast one soil processing projection provided on at least one peripheralside in the soil processing area.
 16. The compactor roller according toclaim 15, wherein the at least one soil processing projection has aprojection height increasing away from the connection area to a maximumprojection height, and/or has a projection height decreasing from themaximum projection height toward the support area.
 17. The compactorroller according to claim 1, wherein at least one roller tool comprisesa first counter-support area that can be supported on the first supportsurface.
 18. The compactor roller according to claim 12, wherein apositive form-locking formation is provided in the support area tocreate a positive form engagement with a counter-positiveform-engagement formation on a roller tool.
 19. The compactor rolleraccording to claim 1, wherein a plurality of second support surfacesarranged at an angle to one another is provided in the support areaaround the holder opening, wherein every second support surface isprovided on one axial side in the adjacent area of a peripheral side.20. The compactor roller according to claim 19, wherein on at least oneaxial side in the support area a third support surface is providedbetween two second support surfaces arranged at an angle relativethereto, and/or that on at least one peripheral side in the support areaa fourth support surface is provided between two second support surfacesarranged at an angle relative thereto.
 21. The compactor rolleraccording to claim 1, wherein that at least one of the second supportsurfaces, the third support surfaces, and the fourth support surfacesare arranged at an angle relative to the first support surface andannularly surround it.
 22. The compactor roller according to claim 19,wherein at least one roller tool has at least one of the following: (i)at least one second counter-support area as a support on a secondsupport surface, (ii) at least a third counter-support area as a supporton a third support surface, and (iii) at least one fourthcounter-support area as a support on at least one fourth supportsurface.
 23. The compactor roller according to claim 1, wherein atransition area of at least one of at least one peripheral side, atleast one axial side, the first support surface, at least one secondsupport surface, at least one third support surface, and at least onefourth support surface, are chamfered or rounded relative to at leastone of a respectively adjacent other side and surface.
 24. The compactorroller according to claim 1, wherein an annular groove-like firstlocking member receiving opening is provided on the inner circumferenceof the holder opening, and/or that an annular groove-like second lockingmember receiving opening is configured on the outer circumference of theholder shaft.
 25. The compactor roller according to claim 24, wherein anannular locking member is received in the first locking-member receivingopening, or in the second locking-member receiving opening for locking aroller tool to a change holder into the respectively other lockingmember-receiving opening.
 26. The compactor roller according to claim 1,wherein a receiving opening is provided on a holder shaft provided on aroller tool for an anti-rotation member to be positioned engaging ananti-rotation recess on the change holder.
 27. The compactor rolleraccording to claim 1, wherein at least one change holder encloses aninner space of the change holder with an outer peripheral surface of thecompactor roller, where the inner space of the change holder is open onat least one axial side essentially oriented in the direction of theaxis of rotation of the compactor roller.
 28. The compactor rolleraccording to claim 27, wherein when a roller tool is attached to thechange holder, a holder shaft provided on the roller tool protrudesthrough a holder opening provided on the change holder into the innerspace of the change holder.
 29. The compactor roller according to claim1, wherein the holder opening provided on the change holder has alongitudinal opening axis essentially radially oriented relative to theaxis of rotation of the compactor roller, and that when a roller tool isattached to the change holder, a longitudinal holder shaft axis of theholder shaft provided on the roller tool is essentially oriented in theradial direction.
 30. A soil compactor comprising at least one compactorroller according to claim 1.